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2. Current meter - Wikipedia

   en.wikipedia.org/wiki/Current_meter

   Propeller-type current meter. The revolutions of the propeller per time interval are counted electronically. A current meter is an oceanographic device for flow measurement by mechanical, tilt, acoustical or electrical means.

3. Ekman current meter - Wikipedia

   en.wikipedia.org/wiki/Ekman_current_meter

   Ekman current meter. The Ekman current meter is a mechanical flowmeter invented by Vagn Walfrid Ekman, a Swedish oceanographer, in 1903.It comprises a propeller with a mechanism to record the number of revolutions, a compass and a recorder with which to record the direction, and a vane that orients the instrument so the propeller faces the current.

4. Vector measuring current meter - Wikipedia

   en.wikipedia.org/wiki/Vector_measuring_current_meter

   After having fabricated and testes several families of propellers, they found the best response in a dual propeller (two propellers fixed on an axle) sensor with two five-bladed, 30-degree pitch propellers with diameter of 22 cm. [1] The propellers are hard anodized, epoxy coated on the exterior, and protected by zinc anodes. They have been ...

5. Water metering - Wikipedia

   en.wikipedia.org/wiki/Water_metering

   A velocity-type meter measures the velocity of flow through a meter of known internal capacity. The speed of the flow can then be converted into a volume of flow to determine the usage. There are several types of meters that measure water flow velocity, including jet meters (single-jet and multi-jet), turbine meters, propeller meters and mag ...

6. Flow measurement - Wikipedia

   en.wikipedia.org/wiki/Flow_measurement

   Propeller-type current meters (similar to the purely mechanical Ekman current meter, but now with electronic data acquisition) can be traversed over the area of the penstock and velocities averaged to calculate total flow. This may be on the order of hundreds of cubic meters per second.

7. Rotor current meter - Wikipedia

   en.wikipedia.org/wiki/Rotor_current_meter

   A rotor current meter (RCM) is a mechanical current meter, an oceanographic device deployed within an oceanographic mooring measuring the flow within the world oceans to learn more about ocean currents. Many RCMs have been replaced by instruments measuring the flow by hydroacoustics, the so-called Acoustic Doppler Current Profilers.